CN102023519A - Image forming apparatus, image forming method and determination method of developing contrast potential - Google Patents
Image forming apparatus, image forming method and determination method of developing contrast potential Download PDFInfo
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- CN102023519A CN102023519A CN201010269513.4A CN201010269513A CN102023519A CN 102023519 A CN102023519 A CN 102023519A CN 201010269513 A CN201010269513 A CN 201010269513A CN 102023519 A CN102023519 A CN 102023519A
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/55—Self-diagnostics; Malfunction or lifetime display
- G03G15/553—Monitoring or warning means for exhaustion or lifetime end of consumables, e.g. indication of insufficient copy sheet quantity for a job
- G03G15/556—Monitoring or warning means for exhaustion or lifetime end of consumables, e.g. indication of insufficient copy sheet quantity for a job for toner consumption, e.g. pixel counting, toner coverage detection or toner density measurement
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/08—Apparatus for electrographic processes using a charge pattern for developing using a solid developer, e.g. powder developer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00717—Detection of physical properties
- G03G2215/00772—Detection of physical properties of temperature influencing copy sheet handling
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G2215/00—Apparatus for electrophotographic processes
- G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
- G03G2215/00535—Stable handling of copy medium
- G03G2215/00717—Detection of physical properties
- G03G2215/00776—Detection of physical properties of humidity or moisture influencing copy sheet handling
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- General Physics & Mathematics (AREA)
- Control Or Security For Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
Abstract
In an image forming method, an execution condition of forcible toner consumption is obtained based on an environmental value at a time of final image formation and a present environmental value, the forcible toner consumption is executed under the execution condition, and image formation is performed after image quality calibration.
Description
The cross reference of related application
The application requires the right of priority of No. the 61/245007th, the U.S. Patent application of No. the 61/242986th, U.S. Patent application submitting on September 16th, 2009 and submission on September 23rd, 2009, and its full content is hereby expressly incorporated by reference.
Technical field
The present invention relates to definite method of a kind of image processing system, image forming method and development compared potential.
Background technology
In the image processing system of electrofax mode, make as the photosensitive surface of image-carrier chargedly, and form electrostatic latent image by exposure.Supply with the developer that contains charged toner to this electrostatic latent image, and be transferred to after the development on the offset medium such as paper.
In such electrofax is handled,, the carried charge of developer need be remained certain value in order to print high quality image.Yet, in long-term attonity or keeping in wet environment following time, the developer discharge, carried charge reduces.Therefore, in printing immediately after such keeping, appearance can not obtain the problem of desired images concentration or contrast (gradation).
Therefore, before print keeping back, form the sub-image of regulation on photoreceptor, and carry out picture quality adjustment (calibration), soon image-forming condition such as image color is suitably changed.Yet, when after the picture quality adjustment, printing continuously, cause the absolute value of developer carried charge to rise because of stirring developer, thereby produce the problem that image color reduces gradually.
Therefore, for a part of toner that the carried charge of changing easy generation carried charge variation reduces, before printed the keeping back, the pressure toner that execution forcibly consumes toner consumed (renewal).After carry out forcing toner to consume, by picture quality adjustment once more, can after printing in the stable image of acquisition.
Before carrying out this pressure toner consumption, consistent in order to make the toner consumption with fixed amount, need carry out the picture quality adjustment.Yet,, can take care of the elongated problem of time that print the back thereby occur to owing to force toner consumption to carry out the picture quality adjustment of front and back.
Summary of the invention
In view of the above problems, thus a first aspect of the present invention provide a kind of do not carry out the picture quality adjustment just can force toner consumption shorten image form before the beginning time and after consecutive image can suppress in forming image color etc. variation, carry out definite method of image processing system, image forming method and the development compared potential of stable image formation.
A second aspect of the present invention provide a kind of can be in image forms the update image formation condition from can be for a long time the image forming method of stop device not.
The image processing system of first aspect present invention comprises: the image forming part that forms the developer image on image-carrier; Test section begins not use above-mentioned image processing system institute's elapsed time when detect using above-mentioned image processing system or the size of the environmental change during the environment comparison when forming with the last image when the last image forms; And developer exhaustion portion, when testing result, when unused time or environmental change surpass prescribed level, under rated condition, forcibly make developer carry out the consumption of developer on attached to image-carrier based on above-mentioned test section.
The image forming method of first aspect present invention comprises: when forming based on the last image and current environment value, obtain the executive condition of forcing toner to consume; Under above-mentioned executive condition, carry out the consumption of above-mentioned pressure toner; And after adjusting picture quality, carry out image and form.
Definite method of the development compared potential of first aspect present invention comprises: in image formed, testing environment value, developer were with at least one parameter in phase and the image formation time; And carry out image based on above-mentioned parameter update image formation condition and form.
The image forming method of second aspect present invention comprises: detect current relative humidity; And the image comparison current potential when forming based on detected above-mentioned current relative humidity, relative humidity when detected image forms before and above-mentioned image and the image comparison current potential obtained are in advance determined the new images compared potential with respect to the alteration trend of relative humidity.
Description of drawings
Fig. 1 shows the formation of the image processing system of an embodiment of the present invention;
Fig. 2 shows the formation of the image forming part of an embodiment of the present invention;
Fig. 3, Fig. 6, Fig. 8 are the process flow diagrams that the image of an embodiment of the present invention forms;
Fig. 4 shows development compared potential of an embodiment of the present invention and the relation between the relative humidity;
Fig. 5 shows the Forecasting Methodology of the image comparison current potential of an embodiment of the present invention; And
Fig. 7 A, Fig. 7 B show in an embodiment of the present invention the table with respect to the toner replacing amount of each parameter value.
Embodiment
Now will be in detail with reference to an embodiment of the invention, illustrate an one example in the accompanying drawings.
Below, with reference to accompanying drawing embodiments of the invention are described.
(embodiment 1)
Fig. 1 illustrates the formation of the image processing system 10 of present embodiment.As shown in Figure 1, be provided with the sensor 11, the clock 12 that is used for obtaining as required attonity time or actuation time that are used to obtain environment values such as relative humidity, be used to obtain the counter 13 that developer has been used phase (the processing number of the developer that has dropped into).Sensor 11, clock 12, counter 13 are connected with storer 14, wherein, described storer 14 is when storage relative humidity etc. environment value, developer have been used the phase, and environment value, developers such as storage relative humidity have been used the relevant of image forming conditions such as phase and developer compared potential (toner attachment side electrostatic latent image current potential and development current potential poor).
In addition, in such image processing system, image forming part can be formed formation shown in Figure 2.As shown in Figure 2, the throughput direction (direction of arrow) along intermediate transfer belt 17 disposes secondary transfer roller 18b and image formation unit 20Y, 20M, 20C and the 20K that is used for the image on offset medium P transfer printing intermediate transfer belt 17.
Each primary transfer roller 24Y, 24M, 24C and 24K are configured in the inboard of intermediate transfer belt 10, and with corresponding photoreceptor 21Y, 21M, 21C and 21K between clamping intermediate transfer belt 17. Dispose exposure device 26Y, 26M, 26C and 26K in the mode that on the outer surface of photoreceptor 21Y, 21M, 21C and 21K between charged device 22Y, 22M, 22C and 22K and developer 23Y, 23M, 23C and the 23K, forms exposure station respectively.Dispose secondary transfer roller 18b in mode with the outer side contacts of intermediate transfer belt 17.
In the image processing system that constitutes like this, at first, in image formation unit 20Y, form yellow toner image.According to the timing that the toner image in image formation unit 20Y forms, in image formation unit 20M, 20C, 20K, also carry out same processing.The toner image of formed redness, cyan, black on the photoreceptor of image formation unit 20M, 20C, 20K also successively primary transfer to intermediate transfer belt 17.
Carry offset medium P from box (not shown), and according to the formation of the toner image on the intermediate transfer belt 17 regularly, offset medium P is flowed to intermediate transfer belt 17 by an accurate position roller (not shown).
Apply bias voltage (+) with the charged polarity opposite polarity of toner by power supply (not shown) to secondary transfer roller 18b.Its result, the toner image on the intermediate transfer belt 17 is transferred on the offset medium P by the transfer electric field that forms between intermediate transfer belt 17 and secondary transfer roller 18b.Set the fuser (not shown) that makes the toner photographic fixing of transfer printing on offset medium P, passed through fuser by making offset medium P, thereby obtain the photographic fixing image.
In addition,, be not specially limited this color sequences here though be that example is illustrated to arrange image formation unit by the color sequences of yellow, redness, cyan, black, and, also can constitute by a image formation unit by black.
For example, shown in the process flow diagram of Fig. 3, use the image processing system that constitutes like this to carry out image and form.
Parameter value and image forming conditions when obtaining the formation of last image in advance.Under the image forming conditions of regulation, form image (ACT1-1), and the environment value when obtaining last image such as relative humidity by sensor 11 and forming, parameter values such as the developer age when obtaining the last image and form by counter 13.And the image forming conditions the when environment value that obtains forms with last images such as development contrast stores in the storer 14 in the image processing system 10 (ACT1-2).Afterwards, disconnect the power supply of image processing system 10.
After placing a week, connect the power supply of image processing system, and from sleep state, recover (ACT1-3).Before forming image once more, obtain current relative humidity equally, and store in the storer 14 in the image processing system 10 (ACT1-4).
Here, Fig. 4 shows as the development compared potential of image forming conditions and the relation of relative humidity.As shown in Figure 4, in initial developer, be used to the development compared potential and the proportional relation of relative humidity of the picture contrast that obtains to stipulate.Fig. 4 shows the value that the developer of handling behind the regulation number promptly stipulates to have used the developer of phase simultaneously.Though initial developer development compared potential reduces with respect to relative humidity, its trend is identical substantially.That is, no matter used the phase, the development compared potential is with respect to the alteration trend almost fixed of relative humidity.
Therefore, as shown in Figure 5, in arithmetic element 15, the development compared potential A of the relative humidity a when indicating last image with respect to storage and forming, and at the point that connects sign and have on the straight line of trend shown in Figure 4, obtain the development compared potential B corresponding with the current relative humidity b that stores.Like this, predict the suitableeest development compared potential, and do not carry out picture quality adjustment described later (ACT1-5) as executive condition.
Then, in image forming part 16, carry out pressure toner consumption (renewal) (ACT1-6) with the image comparison current potential of prediction.By the amount that supply with to consume again, thereby change a part of toner in the developing apparatus of supplying with developer.
Before forcing toner consumption end back, image to form, carry out picture quality adjustment (ACT1-7).,, on the secondary transfer printing band, measure its concentration (adhesion amount) here by sub-image and the development that on photoreceptor, forms regulation, thereby with image forming conditions optimizations such as image comparison current potential, charged bias voltage, exposure intensities.Then, in image forming part 16, carry out image with the image forming conditions of optimization and form (ACT1-8).
Like this, force the executive condition of toner consumption by prediction before image forms, thereby do not carry out the picture quality adjustment and just can force toner consumption, and can shorten the image formation beginning time before, simultaneously, after consecutive image form, can suppress the variation of image color etc., carry out stable image and form.
In addition, in the present embodiment,, enumerated the relative humidity bigger, but also can be other conditions such as temperature toner carried charge influence as environment value.And, when the less grade of the change of environment values such as relative humidity, also can influence the parameter of toner carried charge based on other, obtain the execution necessary condition of forcing toner to consume.
For example, also can obtain executive condition based on the attonity time of image before forming.Can obtain the attonity time by clock 12.And, also can based on developer with expect executive condition.Developer can obtain by counter 13 with the phase.
Preferably begin the prediction that image forms the executive condition that all carries out such pressure toner consumption at every turn.And, also can be set at the attonity time that has surpassed regulation or developer and carry out during with the phase.
(embodiment 2)
In the present embodiment, though use image processing system similarly to Example 1, but different on this aspect of setting the executive condition of forcing toner consumption according to the variation of parameter, for example, process flow diagram as shown in Figure 6 carries out image like that and forms interimly.
At first, similarly to Example 1, image forming conditions with regulation forms image (ACT2-1), environment value when obtaining last image such as relative humidity by sensor 11 and forming, time on date when obtaining the last image and form by clock 12, and store in the storer 14 in the image processing system 10 (ACT2-2).Afterwards, disconnect the power supply of image processing system 10.
Place after the week, connect the power supply of image processing system, and from sleep state, recover (ACT2-3).Before image once more forms, obtain for example current relative humidity and time on date equally, and store in the storer 14 in the image processing system 10 (ACT2-4).
In arithmetic element 15,, calculate humidity and change and the attonity time, as the change (ACT2-5) of parameter value according to being stored in last image in the storer 14 when forming and current relative humidity and the time on date.And, at each parameter, judge whether to carry out pressure toner consumption (ACT2-6).For example, when humidity changed more than or equal to setting or attonity time more than or equal to the stipulated time, judgement will be carried out.
For judging the parameter that to carry out, obtain toner replacing amount (ACT2-7) as executive condition.Can obtain toner replacing amount by the table shown in Fig. 7 A, Fig. 7 B that is stored in advance in the storer 14 with respect to the toner replacing amount of each parameter value.
Relatively,, determine toner replacing amount (ACT2-8), force toner consumption (ACT2-9) thereby carry out by selecting many (the high person of level) based on the toner replacing amount of each parameter.At this moment, for example, the image comparison current potential is fixed, and be equivalent on the offset medium of A3, the full version that forms the number that is equivalent to toner replacing amount is printed pattern such as (solid printing) regulation, thereby discharges the toner of ormal weight.And, by supplying with the amount consumed again, thereby change a part of toner in the developing apparatus of supplying with developer.
After forcing toner consumption to be finished, similarly to Example 1, before forming, image carries out picture quality adjustment (ACT2-10).And, in image forming part 16, carry out image with the image forming conditions of optimization and form (ACT2-11).
Like this, by obtaining executive condition according to table with respect to the toner replacing amount of each parameter value, can carry out suitable pressure toner consumption simply, and after consecutive image form, can suppress the variation of image color etc., form thereby carry out stable image.
In embodiment 1 and embodiment 2,, preferably begin image formation at every turn and all automatically force toner consumption in order to keep picture quality.And, also can at the appointed time form the picture pattern of the corresponding replacing tone dosage of being scheduled to, thereby force toner consumption.For example, after the long-term less number of intermittent printing etc., be resultful when printing continuously etc. with high image quality.
(embodiment 3)
In the present embodiment, though use similarly to Example 1 image processing system, not that prediction is forced the executive condition of toner consumption but difference on this aspect of prediction updated images formation condition in image forms.
That is to say that the prediction of the executive condition that consumes with the pressure toner of embodiment 1 is same, shown in the process flow diagram of Fig. 8, wait under the initial pictures formation condition development compared potential to form image (ACT3-1).And, when image forms beginning, as initial parameter value, obtain initial environment values such as relative humidity by sensor 11, obtain the origination date time by clock 12, obtain initial developer by counter 13 and used the phase (ACT3-2), and store in the storer 14.
When beginning through predetermined processing time or predetermined processing number, similarly obtain environment value, time on date and developer once more with parameter values such as phase (ACT3-3) from image formation.And, similarly to Example 1, based on the parameter value of obtaining in advance that is stored in relevant, the initial pictures formation condition initial parameter value between image forming conditions in the storer 14 and each parameter and has obtained, prediction current optimal image forming conditions (ACT3-4) in arithmetic element 15.
And, will be updated to the condition of prediction in the image forming conditions in the image forming part 16, and continue image formation (ACT3-5).
Even in image such as printing formed continuously, environment values such as relative humidity, developer also changed age.And the toner carried charge also changes according to the image formation time.Therefore, in the prior art, per stipulated time or every processing regulation number all carry out the picture quality adjustment.But, in order to adjust picture quality, need make device temporarily stop the time of certain degree.
According to present embodiment owing to can in image forms, obtain each parameter value, and based on these each parameter value update image formation conditions, so can be for a long time stop device not, continue thereby image is formed.
Though be illustrated with regard to certain embodiment, these embodiments are just given an example, and are not used in to limit the scope of the invention.In fact new method and system described herein can embody with other variety of ways, and in addition, the various omissions of method and system described herein, replacement and change all belong in the scope of aim of the present invention.Claims and equivalent thereof are intended to contain all any way and modifications of conforming to aim with the scope of the invention.
Claims (20)
1. image processing system comprises:
On image-carrier, form the image forming part of developer image;
Test section begins not use described image processing system institute's elapsed time when detect using described image processing system or the size of the environmental change during the environment comparison when forming with the last image when the last image forms; And
Developer exhaustion portion when the testing result based on described test section, when unused time or environmental change surpass prescribed level, forcibly makes developer carry out the consumption of developer on attached to image-carrier under rated condition.
2. image processing system according to claim 1 also comprises:
Storer, storage is by being correlated with between the detected data of described test section and described data and the described rated condition.
3. image processing system according to claim 1 also comprises:
Arithmetic element is connected with described test section, is used to obtain described rated condition.
4. image forming method comprises:
When forming and current environment value, obtain the executive condition of forcing toner to consume based on the last image;
Under described executive condition, carry out the consumption of described pressure toner; And
Carrying out image after adjusting picture quality forms.
5. image forming method according to claim 4, wherein,
Obtain described executive condition based on the attonity time.
6. image forming method according to claim 4, wherein,
Described executive condition with expecting based on current developer.
7. image forming method according to claim 4, wherein,
Obtain described executive condition based on described environment value of obtaining in advance and described executive condition relevant.
8. image forming method according to claim 4, wherein,
Described environment value is a relative humidity.
9. image forming method according to claim 8, wherein,
Described executive condition is development compared potential's a condition.
10. image forming method according to claim 9 also comprises:
Detect current relative humidity; And
Image comparison current potential when forming based on detected described current relative humidity, relative humidity when detected described last image forms and described last image and the image comparison current potential of obtaining are in advance determined the new images compared potential with respect to the alteration trend of relative humidity.
11. image forming method according to claim 4, wherein,
Carrying out stirring developer when described pressure toner consumes.
12. image forming method according to claim 4, wherein,
Form when finishing at image, storage time on date, humidity and developer have been used interim at least one.
13. image forming method according to claim 4, wherein,
When each image forms beginning or in the time of appointment, carry out the consumption of described pressure toner.
14. an image forming method comprises:
In image formed, testing environment value, developer were with at least one parameter in phase and the image formation time; And
Carrying out image based on described parameter update image forming conditions forms.
15. image forming method according to claim 14, wherein,
Described environment value is a relative humidity.
16. image forming method according to claim 14, wherein,
Described image forming conditions is at least one condition in development compared potential, charged bias voltage and the exposure intensity.
17. image forming method according to claim 14, wherein,
Every predetermined processing time or every predetermined processing number carry out described renewal.
18. definite method of the compared potential that develops comprises:
Detect current relative humidity; And
Image comparison current potential when forming based on detected described current relative humidity, relative humidity when detected image forms before and described image and the image comparison current potential of obtaining are in advance determined the new images compared potential with respect to the alteration trend of relative humidity.
19. definite method of development compared potential according to claim 18, wherein,
Described alteration trend is obtained with the mean value of the alteration trend of the developer of phase by initial developer and regulation.
20. definite method of development compared potential according to claim 18 also comprises:
In the relation of relative humidity and image comparison current potential image forming conditions, the described image comparison current potential of the relative humidity when sign forms with respect to described detected in advance image; And
According to the described point that connects sign and have the image comparison current potential corresponding on the straight line of described alteration trend, determine described new images compared potential with described current relative humidity.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US24298609P | 2009-09-16 | 2009-09-16 | |
| US61/242,986 | 2009-09-16 | ||
| US24500709P | 2009-09-23 | 2009-09-23 | |
| US61/245,007 | 2009-09-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102023519A true CN102023519A (en) | 2011-04-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010269513.4A Pending CN102023519A (en) | 2009-09-16 | 2010-08-31 | Image forming apparatus, image forming method and determination method of developing contrast potential |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20110064430A1 (en) |
| JP (1) | JP2011065158A (en) |
| CN (1) | CN102023519A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5247058B2 (en) * | 2007-04-09 | 2013-07-24 | キヤノン株式会社 | Image forming apparatus |
| JP2012078781A (en) * | 2010-09-07 | 2012-04-19 | Ricoh Co Ltd | Image forming device |
| US9250568B1 (en) | 2014-12-05 | 2016-02-02 | Kabushiki Kaisha Toshiba | Image forming apparatus and image forming method |
| JP6450662B2 (en) * | 2015-08-31 | 2019-01-09 | 株式会社沖データ | Image forming apparatus |
| JP2017227710A (en) | 2016-06-21 | 2017-12-28 | 株式会社東芝 | Image formation device |
| US10036978B2 (en) | 2016-11-02 | 2018-07-31 | Kabushiki Kaisha Toshiba | Image forming apparatus and developer replacement method of image forming apparatus |
| JP7206787B2 (en) * | 2018-10-18 | 2023-01-18 | コニカミノルタ株式会社 | IMAGE FORMING APPARATUS, IMAGE FORMING APPARATUS CONTROL METHOD, AND IMAGE FORMING APPARATUS CONTROL PROGRAM |
| US10852692B1 (en) * | 2019-09-16 | 2020-12-01 | Toshiba Tec Kabushiki Kaisha | Image forming apparatus and image forming method |
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- 2010-08-31 US US12/872,113 patent/US20110064430A1/en not_active Abandoned
- 2010-08-31 CN CN201010269513.4A patent/CN102023519A/en active Pending
- 2010-09-15 JP JP2010206727A patent/JP2011065158A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| US20110064430A1 (en) | 2011-03-17 |
| JP2011065158A (en) | 2011-03-31 |
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Application publication date: 20110420 |